WangGuangxin commented on a change in pull request #26011: [SPARK-29343][SQL] Eliminate sorts without limit in the subquery of Join/Aggregation URL: https://github.com/apache/spark/pull/26011#discussion_r339299187
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala ########## @@ -967,12 +967,18 @@ object EliminateSorts extends Rule[LogicalPlan] { * Removes redundant Sort operation. This can happen: * 1) if the child is already sorted * 2) if there is another Sort operator separated by 0...n Project/Filter operators + * 3) if the Sort operator is within Join and without Limit + * 4) if the Sort operator is within GroupBy and the aggregate function is order irrelevant */ object RemoveRedundantSorts extends Rule[LogicalPlan] { def apply(plan: LogicalPlan): LogicalPlan = plan transformDown { case Sort(orders, true, child) if SortOrder.orderingSatisfies(child.outputOrdering, orders) => child case s @ Sort(_, _, child) => s.copy(child = recursiveRemoveSort(child)) + case j @ Join(originLeft, originRight, _, _, _) => Review comment: ok ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org